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3 votes
(y-7)(y+3)<(y-3)(y+3)

User Sungmin
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1 Answer

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If you work out both sides, you get:

y^2 - 4y - 21 < y^2 - 9
-4y < 12
y > -3 (remember, if you divide by a negative number, the less-than flips and becomes a greater than)




User Ivan Nevostruev
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